LCM of 9 & 6 = 18 Multiples of 18 >100 & < 200 18 × 6 = 108 18 × 7 = 126 18 × 8 = 144 18 × 9 = 162 18 × 10 = 180 18 × 11 = 198 ie., 6 numbers.
1 2 3 4 5 6 7 8 9 = 100 Challenge: Place + and - math symbols between the numbers above to make the equation true. Use + and - a total of three times. Do not rearrange the numbers.